输电线路悬垂线夹电磁损耗的有限元分析及结构优化

悬垂线夹作为输电线路中的一种常用金具，常因其材料选择和结构设计的不合理，给电网带来不必要的电磁损耗，不仅浪费电能，还会对周围环境造成电磁干扰。基于ANSYS软件的三维有限元仿真技术，对悬垂线夹及邻近导线进行了电磁场仿真计算，分析了交流输电线路中悬垂线夹的磁场、涡流分布规律，并将电磁损耗的仿真结果与试验结果进行了对比验证。对不同材料悬垂线夹进行计算比较后发现，铁磁材料悬垂线夹的损耗大幅高于铝合金材料悬垂线夹的损耗；对不同结构的悬垂线夹进行计算比较后发现，在适当位置开槽可以减小涡流密度，从而减小电磁损耗。根据以上的分析，提出了减小电磁损耗的优化建议。

Electromagnetic Loss Finite Element Analysis and Structrual Optimization for Transmission Suspension Clamp

As one of the most commonly used fittings in transmission lines, suspension clamp usually led to unnecessary electromagnetic loss due the unreasonable material selection and structure design, which not only wasted electric energy, but also caused electromagnetic interference on the surrounding environment, This paper carded out the electromagnetic simulation research on the suspension clamp and conductor nearby with three dimensional finite element simulation technology base on ANSYS software, analyzed the related laws of suspension clamp＇s magnetic field and eddy current distribution in AC transmission lines, as well as the electromagnetic loss. Then, the simulation result was compared with the experiment and the accuracy of simulation was verified. The calculation and comparison results on suspension clamps with different materials show that suspension clamp made of aluminum alloy has less electromagnetic loss than the one made of ferromagnetic material. According to the simulation research on suspension clamps with different structures, it is show that the grooving can properly reduce the eddy current density and electromagnetic loss in the appropriate place where the value is abnormal. On the basis of the above analysis, some optimization suggestions were proposed for the decrease of electromagnetic loss.